In a low-density cloud, the internal pressure is much too low to support the weight, so the cloud must eventually producing the galaxy s disk.

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

What properties of a moving object are used in determining the object's energy of motion

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.